Spotlight and color control



Get. 28 1924.

J. 'H. WELSH SPOT LI GHT AND COLOR CONTROL Filed Sept. 13. '1920 2 sheezhneez '1-' anon W01,

We [sh J. H. WELSH SPOTLIGHT AND COLOR CONTROL Filed Sent. 13. 1920 2 Sheets-Sheet 2 John 17. Welsh spot light and color control and the prin- Patented Oct. 28, 1924.

1,513,071 PATENT OFFICE.

JOHN HARRY WELSH, OF BROOKLYN, NEW YORK.

SPOTLIGHT AND COLO'R CONTROL.

Application filed September 13, 1920. Serial No. 408,901.

To all whom it may concern:

Be it known that 1, JOHN HARRY WELSH, a citizen of the United States, and resident of the borough of Brooklyn, county of Kings, and city and State of New York,

'have invented certain new and useful Improvementsin Spotlights and Color Controls, of which the following is a specificati'on.

This invention relates to improvements in cipal object is to provide a device. which may be used for producing various scenic filfiects in theatres, store windows and the 1 e.

Another object of the resent invention resides in the provision o a device having a rotary screen through which the light is projected onto an object, which screen may be painted with fi res so that as it revolves, the moving gures will be projected so as. to produce an exceedingly attractive the desired disglay. further object ofithe invention, is'to provide a screen of the above ty the intermittent or constant rotation oi which may be controlled independently of the light so that thsob'ects projected may remain stationary at t e desire of the user.

A more specific object of the invention-is to provide a device wherein screens bearin various color combinations as well as 'di erent designs may be interchanged in order that the effects produced may be varied at the desire of the user.

As a further object the invention contemplates the provision of a device which is compactly constructed so that it may be readily concealed in a show window atsome advantageous oint and in such position that ect may be produced.

With these and other objects in view the invention consists of a novel construction, combination and arrangement of arts which will bejfully set forth in the to owing specification, claimed and illustrated in vticn.

the pccbmpanying drawings in which FIQ. 1, 1s a side view of this invention.

2,;isa vertical sectional-view through ce shown in Fig. 1.

' 'F. 13; shows. a detail of the operating '4, is a top'plan view of Fig. 1, showing :3 cover er hood removed and illusstrating the obyective lens casing in posi- Fig. 5, is a sectional view on line 55 of Fig. 2, illustratin in dot and dash lines the worm gear an I Fig. 6, 1s a sectional view on line 66 of Fi 2.

Reh erring to the drawings in detail, the numeral 1 indicates the base plate of the device on which the motor 2 is mounted. A housing 3 extends upwardly from the base plate and encloses the motor and other mechanisms and supported at the upper end of the housing is a horizontal partition 4 provided with an enlarged central opening to accommodate the lamp supporting and screen operating mechanism.-

The partition wall 4 is provided with an upwardly extending boss 5 which serves as a supporting means for the stationary parts to be later described and also as a bearing for a gear 6,'and secured to the gear 6 are a plurality of arms 77, the upper ends of which are threaded as indicated at 8 and within the threaded arms is supported the color screen 9. The gear 8 is rotated cont-inuously or intermittently by a pinion 10 when the motor 2 is running, the ratchet and dog 16 and 17 will cause the shaft 11 to rotate, thus revolving the screen 9 at a speed less than the speed of rotation of the motor 2.

I provide a solenoid 18 having a movable core 19 connected to the lever 20. This lever is supported by a bracket 21 and is moved inward toward the solenoid coil 18 by the -movement of the core 19 and outward away from the solenoid coil by a spring 22. A dog 23on the lever 20 engages a ratchet 24 uponthe hub of the gear 6 and it will be seen that when the solenoid 18 is energized.

its core, the lever 20 and dog 23, will cause the gear 6 to be moved in a rotary direction a predetermined distance and that a series of impulses through the coil will cause a rotation of the gear 6 and screen 9.

I Secured u n the boss or pro'ection 5 is a s ider 25 w ich-supports a cy indrical en- 0 osing member 26. The top of this cylin der 26 may be open and the bottom closed only bya suit-able number of armsof the spider 25. The wall of the cylinder is completeexcept for an opening 27 of a termined size. The opening 27 should be a circular opening corresponding in diameter to the diameter of a lens 28 supported in the lens casing 27' which is secured upon the 0 lindrical member 26 and it is through this ens that-a light to be later described will be projected outward through the color screen 9and through an opening 29 in the main casing 30.

Supported upon the -boss is a socket 31 which may be an ordinary lamp socket adapted to receive the lamp 32 and behind the lamp or at a place approximately oppo- "ferred to, should be formed of an opaque site the lens 28'is a reflector 33 of suitable design. The reflector may be supported up- .on a bracket 34 secured to one of the arms of the spider 25.

The cylindrical member 30, before rematerial so that no light can pass there through. The bottom of. this cylindrical member is secured in-a suitable manner to the partition 4 and to the lower casing member 3 and the upper end of the cylin- I a disk 36 which disk has a reflecting surface drica'l member, while providin passage for air and proper ventilation of, the entire device, should also be light tight. To aocomplish this I providea cap supporting and the cap is arranged away from the top of the cylinder 30 so that ventilation may be secured in the direction of the flow-arrows shown in Fi '.-2. V Secured upon tl r casing'30 is a suitable cylindrical focusing member 37 carrying an objective-lens 38 and possibly a diaphragm or concentrator 39. "These parts are so well known and their operation so well understood that no detailed description thereof is considered necessary.

. Arranged within the casing member 3 is a resistance coil 40 by means of which the redeit will be noted that the chamber in which the coil is arranged, is ventilated. The introduction of resistance into the motor circuit will not diminish the intensity of the lamps 'rays asit is my intention that the motor and lamp be arranged upon independent cireui .In operation the cover plate 31, is removed as illustrated in Fig. 3 whereupon the screen 20, bearingthe desired characters .or figures, may besecured in place; The cover plate is'then replaced and upon lighting the lamp and operating the motor or solenoid, it will be obvious that the screen will be rotated to cause the objects projected thereby to a parently travel across the surface upon w ich the light. rays are when the device isvused in window decoration it willmaterially aid in the general appearance of a show window. Y

While in the foregoing" there has been shown and described a preferred embodiment of this invention, it is to be understood that certainminor changes in the details of construction, combination and ar rangement of parts ma be resorted to without departing from t e spirit and scope of theinvention as claimed.

What I claim is:

cylindrical casings, one within the other and and lenses therein, one said lens being. ad-

means for rotating it-comprising a motor A spot light comprising a plurality of I .each being providedwith lens. apertures and gears and pinions operated thereby, and Q means for intermittently rotating said cyl-:

inder comprising a solenoid and a ratchet and pawl adjacent toone said gear.

Signed at the city, county and state of 0 New York this 13th da of August 1920.

, JOHN ARRY WFl LsH. 

